Opening a JST File

The JST file type is primarily associated with Text Editor.

JST	File extension: JST
	File type:	template file

What is a JST file?

JST files mostly belong to Text Editor. JST files are used for different purposes, depending on the context.

JavaScript Template File: This file holds template code that includes JavaScript syntax. Libraries such as Underscore.js use these to embed dynamic content into HTML. The file is text-based and you can view or edit it with any basic text editor.

Gobblin Job State File: In some workflows, a JST file records state information for tasks managed by Apache Gobblin. It contains job-related data that tracks progress and task status. More details are available at Gobblin.

Encrypted File: At times, the JST extension is also assigned to encrypted files used by a crypto application. These files require specific decryption tools to reveal their contents.

FilExt.com notes: To use these files, first inspect the content using a text editor. If the content appears as readable code or state data, it is likely a JavaScript template or a job state file. If the content is unreadable gibberish, the file might be encrypted and needs a proper decryption key.

How to open a JST file

You need a suitable software like Text Editor to open a JST file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your JST file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a JST file directly in the browser:. Just drag the file onto this browser window and drop it.

Online JST Text Viewer

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Programs that open and convert JST files:

Text Editor
See the previous paragraphs to learn more about the main application. JST files are often referred to as Text Editor web (source)s because this type of file is primarily created or used by this software.
Code Crusader (Symbol Database) by New Planet Software
Code Crusader is a graphical Integrated Development Environment (IDE) designed to integrate the tasks of working with source files, compiling, and debugging. This file format is classified as Database.
Jnes (Saved Game State File) by JaboSoft
Jnes is a NES emulator for Win32 platforms that uses DirectX. A file with the JST extension is created by JNES when you save a game during game play. For example, if you play Super Mario Brothers, a file with the name Super Mario Brothers.jst will be saved in the saves subdirectory. On restart, you must open JNES, then Super Mario Brothers, now click CPU then restore. If the JST file isn't corrupt, you should go back to where you left off in the game.

JST file format:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The file format can be deduced from the file extension and the signature. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our evaluation of the JST files looks like this:

JST is not that commonly used as a file extension. This file type includes different formats for the applicable programs. The two most popular formats are as follows:

25% of all JST files have the same signature crypto--. They consist of illegible, cryptic characters. JST files can be up to 280 KB in size, but are often around 5 KB - 140 KB. The file type was created recently. Certain words are almost always found in the files, such as crypto--. The following filename is common: 8053321.jst or 16550903.jst.
20% of all JST files start with the bytes (e, ...t) => { /*! * This file is part of eyeo's Anti crucial for this file format. The content consists of readable text data, which can be read using a text editor. JST files can be up to 50 KB in size, but are often around 43 KB - 50 KB. The keywords (e, ...t) => {, * @eyeo/snippets is free software: you can redistrib, * Copyright (C) 2006-present eyeo GmbH and * This file is part of eyeo's Anti-Circumvention Snippets module (@eyeo/snippets) are typical for these files. isolated-first.jst is a typical file name.

The remaining 55% of all JST files are different files with different signatures, such as Jnes save state, ZIP and SEQ. They are often associated with sassafras or dataset. If you want to find out what your JST file contains, drag and drop it onto this page.

Technical Data for JST File Extension

File classification:

Web (source)

Related files:

js, tpl, tmpl, enc, job, jsf, jtsl, png, jsp, jmk, jup, jcc, html, txt, xml, json

Mime type:

application/octet-stream

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: SNS.Worksheet.8
EXEFile: %ProgramFiles%\JUSTSY~1\SNS13\SANSHIRO.EXE /Exist

ProgramID: SNS.Worksheet.8
EXEFile: C:\JUST\SNSWIN8\SANSHIRO.EXE /Exist

a jst template file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with JST files

Associate the JST file extension with the correct application.
Update your software that should actually open template files. Because only the current version supports the latest JST file format. Search, therefore, e.g. on the manufacturer website after an available Text Editor update.
To make sure that your JST file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .JST file online - secure, fast, and no downloads needed.